I see a lot of angst and frustration on this forum. Presumably from trainees, associates, partners who have their own fair share of injustices they have experienced over the years.
I think the anger is justified but you should know that karma comes one round.
A former manager/colleague/ex-lover, etc, might have done you wrong, but at the end of the day, it’ll all add up. It could manifest in various ways, eg family issues, children, difficult in laws, future health problems, etc.

So don’t care too much. Lex talionis.